Lubricating oil compositions

ABSTRACT

The present application relates to biodegradable zero drip lubricating oil composition. The lubricating oil composition comprises a) an oil soluble polyalkylene glycol polymer; b) a vegetable base stock; and c) organic solvent excluding alcohol, wherein the oil soluble poly alkylene glycol and the vegetable base stock are present in a weight ratio from 1:2.6 to 1:8. The biodegradable lubricating oil compositions have high film strength, high load carrying capability, zero anti-drip property and maximum penetrability in the chain linkages, for application in roller chains and driving power trains having complex chain linkages.

TECHNICAL FIELD

The present application relates to lubricating oil compositions. Inparticular, the present application pertains to a once throughapplication of a non-drip lubricating oil compositions for roller chainsand driving power trains having complex chain linkages.

BACKGROUND

Lubricants typically comprise base oil(s) with additives. Suchlubricating oils have been in use for lubrication of roller chains anddriving power trains.

Simple tacky heavy viscous lubricants made of animal waxes, petroleumbase stocks have been used since historical days. These viscous chainlubricants provide great film strength to ensure metal to metal contactdoes not occur, and hence have high load bearing characteristics.

The roller chains have rollers in each chain link, rotating on pins. Therollers and pins are held in place by means of end plates, morespecifically inner and outer end plates. There are different types ofmotions encountered in these chains which demand the followingadditional properties from a lubricant:

-   -   a) Good penetration capability between the solid linkages to        ensure all closely mated parts are wetted with the lubricant.    -   b) Exceptional shear strength of the lubricant film which does        not allow it to be squeezed off from between the mated parts.    -   d) Optimum tackiness to ensure the chain always remains wet and        tacky with the lubricant and does not attract dust or dirt from        the road    -   e) Strong adhesion of the oil film to the metal surface        especially when squeezed at the contact zone, this property        improved by the polarity of the lubricant.

CN103773574 patent application relates to lubrication oil and apreparation method thereof. Disclosed lubricating oil compositioncomprises percentage by weight: 1.6 to 12.0% of composite additivepackage; 0.0001 to 0.01% of anti-foaming agent; and 70 to 90% ofoil-soluble polyalkylene glycol; and, the balance base oil.

EP0468109 patent application provides biodegradable lubricants andfunctional fluids for use in an operation of lubricating oil. The oilcomprises at least 10% by volume of at least one substantiallybiodegradable liquid hydrocarbon.

WO2016/043800 patent publication relates to a lubricant compositioncomprising a lubricant base, an oil soluble polyalkylene glycol, and anadditive comprising (1) alkylated phenyl-α-naphthylamine; and (2)2,2,4-trialkyl-1,2-dihydroquinoline.

SUMMARY

In an aspect, the present application provides a lubricating oilcomposition comprising a) an oil soluble polyalkylene glycol polymer; b)a vegetable base stock; and c) an organic solvent excluding alcohol. Theoil soluble polyalkylene glycol and the vegetable base stock are presentin the weight ratio from 1:2.6 to 1:8.

The biodegradable lubricating oil composition has high film strength,high load carrying capability, zero drip property and maximumpenetrability in the chain linkages, for roller chains and driving powertrains having complex chain linkages.

The above summary is not intended to describe each embodiment or everyimplementation of the finding disclosed here. The Figures, Detaileddescription and Examples that follow more particularly exemplify theseembodiments.

BRIEF DESCRIPTION OF ACCOMPANYING DRAWINGS

The disclosure herein may be more completely understood in considerationof the following detailed description of various embodiments inconnection with the accompanying drawings, in which:

FIG. 1 provides a schematic diagram of chain loader tester in accordancewith an embodiment of the present disclosure.

FIG. 2A provides a schematic diagram of penetration test front elevationin accordance with an embodiment of the present disclosure.

FIG. 2B provides a schematic diagram of penetration test plan view inaccordance with an embodiment of the present disclosure.

DETAILED DESCRIPTION

The roller chains, which are increasingly present in two andthree-wheeler motorcycles and driven by a gasoline power train, have thefollowing specific demands.

-   -   a) To transmit load in the range of 100 to 150 kilograms.    -   b) To ensure continuous rolling and sliding motion over chain        sprockets and linkages without generating excessive wear and        tear and heat, frictional losses.    -   c) The sliding and rolling speeds peaking about 40 meter/sec.    -   d) Re-lubrication intervals to range from weekly to monthly        schedules.    -   e) Exposure to continuous water, dust, sand and other        atmospheric vagaries.

The lubrication of these complex linkages is often not accessible orvisible from the outer surface of the chain and has always been achallenge.

The use of low viscosity chain spray lubricants has been increasinglyprevalent on light loaded chains such as for motorcycles and bicycleswhere stickiness from high viscous tacky products on the chain surfacecan seriously reduce the useful life of the chains due to the Three Bodyabrasion phenomenon. However, these chain lubricants often suffer lowfilm strength and low load carrying capabilities. Moreover, viscousproducts cannot be sprayed owing to the limitations of being dispersibleby gaseous propellants.

Some products exist where the viscous lubricants are thinned down byusing fast evaporating solvents and then sprayed from canisters andaerosols. This has a bigger disadvantage of suffering from excessivedripping which results in wastage of the useful lubricant. Further, theapplication areas do not receive as much lubricant as required, as thesprayed product does not have enough time to sink in on the surface ofthe chain, and instead flows down and away due to the dripping action ofthe solvent.

Heavy and tacky lubricants have a limit for penetrating intricate gapspresent in modern day roller chain construction. In addition tosuffering from poor penetration and wetting of internal linkages, theselubricants remain on the outer surface of the chain allowing the chainto attract a lot of dirt and thereby making the chain sticky. Thisfurther has a damaging effect when the chains are exposed to dustparticles and minerals found in the dust laden roads and otherchallenging environments.

Despite new types of material and advanced technology, the complex chainlinkages still require effective lubrication to meet all the demands ofthe roller chains and gasoline driven power trains. Therefore, there isa need for lubricating oil compositions which provide effective chainlubrication, reduced wear on chain links, impact damping, high filmstrength, high load carrying capability, dispersible into fine mist,reduced galling, and zero drip characteristics, which thereby enablesmaximum residence time for the lubricant on the metal topographyallowing better lubrication of individual elements in the chainlinkages.

For the purposes of the following detailed description, it is to beunderstood that the invention may assume various alternative variationsand step sequences, except where expressly specified to the contrary.Moreover, other than in any of the operating examples, or whereotherwise indicated, all numbers expressing, for example, quantities ofingredients used in the specification are to be understood as beingmodified in all instances by the term “about”. It is noted that, unlessotherwise stated, all percentages given in this specification andappended claims refer to percentages by weight of the total composition.

Thus, before describing the present invention in detail, it is to beunderstood that this invention is not limited to particularlyexemplified systems or method parameters that may of course, vary. It isalso to be understood that the terminology used herein is for thepurpose of describing particular embodiments of the invention only, andis not intended to limit the scope of the invention in any manner.

Unless otherwise defined, all technical and scientific terms used hereinhave the same meaning as commonly understood by one of ordinary skill inthe art to which this invention pertains. In the case of conflict, thepresent document, including definitions will control.

It must be noted that, as used in this specification and the appendedclaims, the singular forms “a,” “an” and “the” include plural referentsunless the content clearly dictates otherwise. Thus, for example,reference to a “polymer” may include two or more such polymers.

The term “ free” as used in the specification means that the compositionis completely free of the referred agents or additives.

The term “tribological additives” as used in the specification meansadditives that have been added to the composition which are surfaceacting and sacrificial in nature, protecting the parent surface fromeffects of friction and consequent seizure and wear.

The term “tackifiers” refer to additives mixed in lubricants and greasesto provide tack and surface adherence in fluid lubricants andstringiness in grease formulations. These are polymers likepoly-isobutylenes, poly-alpha olefins or olefin copolymers and aremiscible with the oil phase of the lubricant.

As used herein, the terms “comprising” “including,” “having,”“containing,” “involving,” and the like are to be understood to beopen-ended, i.e., to mean including but not limited to.

The recitation of all numerical ranges by endpoints is meant to includethe endpoints of the range, all numbers subsumed within the range, andany range within the stated range.

In one aspect, the present application provides a lubricating oilcomposition for roller chains, increasingly present in two andthree-wheeler motorcycles which are driven by a gasoline power train.The lubricating oil composition comprises a) an oil soluble polyalkyleneglycol polymer; b) a vegetable base stock; and c) organic solventexcluding alcohol. The oil soluble polyalkylene glycol and the vegetablebase stock are present in the weight ratio from 1:2.6 to 1:8.

The oil soluble polyalkylene glycol polymer may be derived frompolymerization of butylene oxide monomers. In some embodiments, the oilsoluble polyalkylene glycol polymer may be at least 12%, at least 14% oreven at least 15% by weight of the lubricating oil composition and/orthe oil soluble polyalkylene glycol polymer may be no greater than 24%,no greater than 21% or even no greater than 18% by weight of thelubricating oil composition. In accordance with an embodiment, the oilsoluble polyalkylene glycol polymer is present from 15% to 18% by weightof the composition. Use of oil soluble polyalkylene glycol polymer inthe said weight percentage range provides high film strength and metalaffinity to the lubricant increasing the load carrying and durabilitycharacteristics for roller chains.

In accordance with an embodiment, the oil soluble polyalkylene glycolpolymer has a kinematic viscosity from 612 cSt to 748 cSt at atemperature of 40° C. and a viscosity index of 170 or above. In someembodiments, the oil soluble polyalkylene glycol polymer viscosity maybe at least 414 cSt, at least 500 cSt or even at least 612 cSt. The oilsoluble polyalkylene glycol polymer when present in the said viscosityincreases the load carrying capability and aids the anti-dripcharacteristics of the lubricant oil to a desired level set for itsapplication.

In a specific embodiment, the oil soluble polyalkylene glycol polymer isobtained from the polymerisation of butylene oxide monomer group.

The lubricating oil composition in accordance with the disclosurecomprises vegetable base stock as the base oil. In accordance with oneembodiment, the vegetable base stock is present from 71% to 75% byweight of the composition. In some embodiments, the vegetable base stockmay be at least 60%, at least 65% or even at least 71% by weight of thelubricating oil composition and/or the vegetable base stock may be nogreater than 80%, no greater than 78% or even no greater than 75% byweight of the lubricating oil composition.

In one embodiment, the vegetable base stock includes, but is not limitedto, castor oil, olive oil, peanut oil, rapeseed oil, corn oil, sesameoil, cotton seed oil, soybean oil, sunflower oil, hemp oil, linseed oil,tung oil, jojoba oil, lard oil, and/or derivatives thereof. In certainembodiments, the vegetable base stock includes double refined rapeseedoil, hydrogenated castor oil, and/or derivatives thereof. In aparticular embodiment, the vegetable base stock is hydrogenated castoroil.

In accordance with an embodiment the vegetable base stock has akinematic viscosity from 200 cSt to 300 cSt at a temperature of 40° C.

The oil soluble alkylene glycol and the vegetable base stock are presentin a weight ratio from 1:2.6 to 1:8.

In some embodiments, the weight ratio of the oil soluble alkylene glycoland the vegetable base stock may be at least 1:2.6, at least 1:3, atleast 1:3.5 or even at least 1:3.88 and/or the weight ratio may be nogreater than 1:6.3, no greater than 1:5.5, no greater than 1:5 or evenno greater than 1:3.88. In accordance with one embodiment, the oilsoluble alkylene glycol and the vegetable base stock are present in theweight ratio from 1:3.88.

Synergistic effect is observed when one part of oil soluble polyalkyleneglycol polymer is mixed with between 3 to 8 times by weight of thevegetable base stock which is dispersible in the presence of a solventusing a gaseous propellant to provide unique non-drip characteristics.The disclosed composition further satisfies the requirements of zerodrip, disperseability, chain wear and elongation test requirementswithout the use of any flow modifier or thixotropic agents in thelubricant oil composition. This is due to the unique rheology and lowerviscosity at room temperature allowing for non-drip feature and easydisperseability of the lubricant oil through an aerosol.

The lubricating oil composition further comprises a solvent. Inaccordance with one embodiment, the solvent is an organic solvent. Inaccordance with some embodiments, the solvent is selected from the groupof organic solvents having an evaporation rate in the range of 6 to 9.The evaporation range here is a ratio of evaporation rate compared toreference n-butyl acetate. In accordance with some embodiments, theorganic solvents include saturated hydrocarbons, oxygenated solvents,petroleum oils, aromatic hydrocarbons, ketones, glycols, glycol ethers,and/or halogenated solvents, excluding any alcohols.

In certain embodiments, the organic solvent is a non-polar hydrocarbonsolvent. In some embodiments, the non-polar hydrocarbon solvent may beat least 4.5%, at least 5% or even at least 5.5% by weight of thelubricating oil composition and/or the non-polar hydrocarbon solvent maybe no greater than 7%, no greater than 6.5% or even no greater than 6%by weight of the lubricating oil composition. In a particularembodiment, the non-polar hydrocarbon solvent is present up to 6% or upto 5% by weight of the composition. In one embodiment the non-polarhydrocarbon solvent is present at 5.5% by weight of the composition. Thenon-polar hydrocarbon solvent in accordance with the present disclosuremay have a minimum purity of 99%. The solvent, e.g. the non-polarhydrocarbon solvent, of the present disclosure may be a fast evaporatingsolvent. In some embodiments, the evaporation rate (evaporation rangehere is a ratio of evaporation rate compared to reference n-butylacetate) is from 6 to 9.

Addition of higher quantities of the solvent readily increases thepenetration performance of the lubricant oil, which also helps intemporary reduction in viscosity to aid the lubricant in entering thecrevices and minor clearances thus helping to protect the roller chainlinkages.

In accordance with an embodiment, the lubricating oil compositionfurther comprises tackifiers and additives. In a further embodiment, theadditives may be tribological additives, anticorrosion additives and/orde-foaming agents, color pigments and/or perfumes.

In an embodiment the tackifiers is selected from the group consisting ofbut not limited to poly isobutylene, olefin copolymer and/or poly alphaolefins. In a certain embodiment the tackifier is long chainpolyisobutylene having a kinematic viscosity of 2500 to 3300 cSt at 100°C. In some embodiments, the tackifier may be present in the lubricatingoil composition in an amount no greater than 3.5% by weight, no greaterthan 3% by weight, no greater than 2% by weight or even no greater than1.3% by weight. The tackifier in accordance with the present disclosureis present in the amount up to 1.3% by weight. The tackifiers present insuch an amount increases the adhesion of oil on the metal substrate ofthe chain linkage.

The tribological additives, like extreme pressure additive and anti-wearadditives, are used for improving the wear and seizure performance ofthe roller chains. The anti-wear additives include phosphorous,sulfur-phosphorous or chlorosulfur compounds, a chlorinated hydrocarboncompound or mixtures thereof. Examples of anti-wear additives includetri-cresyl phosphates, zinc dialkyl dithio phosphates and zinc dialkyldithio carbamates. In some embodiments, the anti-wear additives may bepresent in the lubricating oil composition in an amount no greater than5% by weight, no greater than 3% by weight, no greater than 2% byweight, or even no greater than 1% by weight. In some embodiments, theanti-wear additive in accordance with the present disclosure is presentin the amount up to 1.6% by weight.

Extreme pressure additives include chlorine compounds like chlorinatedparaffins, sulfur phosphorous compounds, sulfurized olefins, sulfurizedpolyols and organo sulfur compounds. These additives chemically reactwith the surface upon localized high pressure conditions initiated bysliding surface contacts and form a protective sacrificial tribo-layer.In some embodiments, the extreme pressure additives may be present inthe lubricating oil composition in an amount no greater than 5% byweight, no greater than 3% by weight, no greater than 2% by weight oreven no greater than 1.0% by weight. In one embodiment, the extremepressure additive in accordance with the present disclosure is presentin the amount up to 2.3% by weight.

The lubricating oil composition may further comprise other additivesincluding further additional oxidation inhibitors, dispersants,viscosity index modifiers, rust inhibitors, and/or pour pointdepressants.

In accordance with an embodiment, the lubricating oil compositionfurther comprises a corrosion inhibitor and a metal deactivator. Thelubricating oil composition is further free of anti-sag and flowmodifier additives. It is economically disadvantageous to add suchadditives as it involves the use of high-speed dispersion test equipmentfor manufacture of lubricant oil.

In accordance with an embodiment, the lubricating oil composition has aviscosity index as measured using ASTM D 2270 standard from 150 to 180.The viscosity retention at increased temperatures is brought about bythe high viscosity index of oil soluble polyalkylene glycol polymerallowing retention of the oil film at localized contact zones where hightemperatures result, where conventional oils get thinned and squeezedout.

The lubricating oil composition according to the present disclosure issynergistically shear stable and sag resistant, thereby allowing it tostay on the surface of the chain rendering the roller chain linkages auniform coating of lubricant. The disclosed composition achieved theright amount of penetration index and zero drip characteristics neededto meet the application requirement in the roller chains.

The disclosed lubricating oil composition not only achieves high filmstrength that promises high load carrying capability but also easily andeffortlessly disperses into fine mist using gaseous propellants. Thedisclosed lubricating oil exhibits zero dripping property and an extremehigh viscosity index and thus a low application viscosity at roomtemperature. The viscosity of the lubricating oil composition isretained at the Hertzian contact zone, often in micron sizes wherelocalized high temperatures are encountered. The lubricating oilcomposition further exhibits superior penetration by reaching thecomplex individual elements in chain linkages, thereby providing betterlubrication.

Exemplary Embodiments

Embodiment 1 is a lubricating oil composition comprising a) an oilsoluble polyalkylene glycol polymer, b) a vegetable base stock, and c)an organic solvent excluding alcohol, wherein the oil solublepolyalkylene glycol and the vegetable base stock are present in a weightratio from 1:2.6 to 1:8.

Embodiment 2 is a lubricating oil composition of Embodiment 1, furthercomprising tackifiers and additives.

Embodiment 3 is a lubricating oil composition of Embodiment 1, whereinthe oil soluble polyalkylene glycol polymer is present in the range of10% to 18% by weight of the composition.

Embodiment 4 is a lubricating oil composition of Embodiment 1, whereinthe vegetable base stock is present in the range of 71% to 79% by weightof the composition.

Embodiment 5 is a lubricating oil composition of Embodiment 1, whereinthe organic solvent is a fast evaporating solvent with evaporation rate(evaporation range here is a ratio of evaporation rate compared toreference n-butyl acetate) in the range of 6 to 9.

Embodiment 6 is a lubricating oil composition of Embodiment 1, whereinthe organic solvent is present in the range of 4% to 7% by weight of thecomposition.

Embodiment 7 is a lubricating oil composition of Embodiment 1, whereinthe organic solvent comprises at least one of saturated hydrocarbons,oxygenated solvents, petroleum oils, aromatic hydrocarbons, ketones,glycols, glycol ethers, and halogenated solvents.

Embodiment 8 is a lubricating oil composition of Embodiment 1, whereinthe vegetable base stock comprises at least one of castor oil, oliveoil, peanut oil, rapeseed oil, corn oil, sesame oil, cotton seed oil,soybean oil, sunflower oil, hemp oil, linseed oil, tung oil, jojoba oil,lard oil, and derivatives thereof.

Embodiment 9 is a lubricating oil composition of Embodiment 1, whereinthe vegetable base stock is a hydrogenated castor oil.

Embodiment 10 is a lubricating oil composition of Embodiment 1, furthercomprising at least one of an anti-wear additive, extreme pressureadditive, a corrosion inhibitor and a metal deactivator.

Embodiment 11 is a lubricating oil composition of Embodiment 1, whereinthe vegetable base stock has a kinematic viscosity in the range of 200cSt to 300 cSt at a temperature of 40° C.

Embodiment 12 is a lubricating oil composition of Embodiment 1, whereinthe oil soluble polyalkylene glycol polymer has a kinematic viscosity inthe range of 612 cSt to 748 cSt at a temperature of 40° C.

Embodiment 13 is a lubricating oil composition of Embodiment 1, whereinthe composition is free of anti-slag and/or flow modifier additives.

Embodiment 14 is a lubricating oil composition of Embodiment 1 having aviscosity index as per ASTM D 2270 between 150 and 180.

EXAMPLES

These examples are merely for illustrative purposes and are not meant tobe limiting on the scope of the appended claims. All parts, percentages,ratios, and the like in the examples and the rest of the specificationare by weight, unless noted otherwise.

Inventive Examples 1-8 & Comparative Examples 1-7

The components shown in Tables 2 and 3 were blended to preparelubricating oil compositions. The lubricating oil compositions preparedin Inventive Examples and Comparative Examples were analyzed and thenthese compositions were tested for performance as described furtherbelow under section Test Methods. All the results are shown in Tables 2and 3.

The identity of the specific constituents of the lubricant oilcomposition of the present disclosure is listed in Table 1.

TABLE 1 Manufacturer/Source Material Description of origin/SupplierCastor oil Pale yellow clear liquid with a free Cauvery Petrochemicals,fatty acid value less than 3.5% Bangalore Oil Soluble poly-glycol Madefrom butylene oxide Manufactured by DOW (OSP 680) monomers chemicals.Organic solvent Solvents such as saturated Ponpure, Exxon Mobil,hydrocarbons, petroleum oils, Dow chemicals aromatic hydrocarbons,ketones, glycols, glycol ethers and halogenated solvents TackifierPoly-isobutylene chains having a Exxon Mobil or viscosity of 2500 to3300 cSt at Functional Products Inc. 100° C. Tribological additivesAntiwear and extreme pressure Lubrizol corporation agents such as zincdi-alkyl dithiophosphate and sulfurized olefins

Test Methods

The following tests have been performed to qualify the overallperformance of the chain lubricants, these tests are:

Product Performance tests—simulating the actual motorcycle fieldconditions where the product must demonstrate its capability to performin the conditions that would typically lead to premature failure of themotorcycle chain

Product Application tests—defining the application requirements of theproduct while being applied on the chain.

Product Performance Test

Accelerated chain wear and elongation testing: This is a load bearingcapability test; the load bearing capability was tested in a simulatedbench test of an actual motorcycle roller chain which was held betweenthe two sprockets on a laboratory bench tester, this was driven at 2950RPM for 72 hours, the driven sprocket had free sliding movement on ahorizontal axis and was held in horizontal tensile load of 150kilograms. This load was transferred to the chain, and the chain waslubricated every 24 hours. The machine was stopped for 5 minutes at theend of every 24 hours to enable re-lubrication of the chain.

Before start of the test, the factory chain sprocket set was washed andcleaned thoroughly in solvents hexane, toluene and ethanol and dried inan oven at 50° C. for 10 hours and cooled. This was done to ensure thatthe factory filled lubricant was removed completely and that the chainwas dry and fresh for use with the formulated chain lubricant.

The load capability of the lubricant was deemed as Pass or Fail. Thelubricant Failed if:

-   -   More than 2 chain rollers were broken, damaged and felloff        during the test;    -   A chain broke due to fracture during the test; and/or    -   The chain side end plates seized during the test leading to        rigidity of the chain as examined during re-lubrication,        within the 72-hour test protocol.

FIG. 1 illustrates the chain load tester which is used to determine theload bearing capability of the chain lubricant.

Product Application Tests

-   -   a. Disperseability (tested using a pressurized aerosol        canister)—This test was performed by packing the formulated        product which is to be dispersed, in an Aerosol tin with        Liquefied Propane Gas propellant in a maximum volume ratio of        Active Material: Propellant weight ratio being 70:30. The        aerosol was tested for spray effectiveness while shaking the        bottle periodically.        -   The entire contents of the bottle had to be emptied for the            test to pass. This test allowed identifying if the product            is dispersible. In case issues of disperseability are            present the spray from the aerosol will not be consistent.            It would also result in active material residue remaining            un-dispensed from the aerosol bottle. This would mean a            product loss for the end user as the material residue cannot            be dispensed out of the bottle. In the event of a            non-uniform spray pattern, the product application on the            chain might not be effective and product might not spread as            effectively on the chain to properly lubricate and protect            the chain resulting in product application failures and            inadequacies.    -   b. Zero Drip (No Sag on Spray Application)—This was tested by        spraying the contents on a vertically held target non-porous        surface like fiberglass or float glass or smooth plastic surface        which had no visible texture rendered on the surface topography.        The spray was dispensed from an aerosol bottle which was held at        15 to 30 cm from the target surface and moved horizontally while        spray application was in progress. The drip or sag feature was        tested between 30 to 45 seconds after spray application. The        test was considered to Pass if no visible and appreciable sag        was found on the target surface. The drip feature found in this        application was of high importance as only the stated        application with its unique synergy could optimize to reduce the        viscosity, reduce drip and increase the dispenseability of the        lubricant from pressurized aerosol containers.    -   c. Penetration distance in a gap 10 micron high and 50 mm        wide—The penetration of the product was checked using a 10        microns gap created between a smooth glass and cast iron metal        panel finished to SA 2.5 micron surface finish. The panels were        separated using a 10 microns thickness film tape. The width of        the panel opening was 50 mm and the length of the panel was        100 mm. The spray was applied on the panel gap opening keeping        an application distance between 5 to 10 mm. The panel        arrangement is shown in FIGS. 2A and 2B.        -   It was observed that where the penetration distance at the            gap of width 50 mm, was found to exceed 10 mm, the            penetration was deemed effective and passing. Any value less            than 10 mm a penetration was reported as a Failure.

The specific components of the lubricant oil composition used incomparative examples are listed in Table 2

TABLE 2 Load bearing Penetration Capability Disperse- Index Ratio of(tested ability (Penetration Polymer using the (tested using Zero Dripdistance as % Polymer Vegetable (OSP): Veg Chain a pressurised (No Sagon Aspect Ratio Composition (OSP) Base Stock Base stock TackifierSolvent Load aerosol Spray in 10 micron Examples Description (%) (%)(w/w) (%) (%) Tester) canister) Application) GAP) Comp Ex 1 Castor Oil —✓ NA — — Fail Pass Fail Fail Comp Ex 2 OSP 680 ✓ — NA — — Pass Fail NAFail Comp Ex 3 OSP 680 + Castor 14 70 1:5 — 3 Pass Fail Pass Pass Oil +3% Aliphatic Solvent Comp Ex 4 OSP 680 + Castor 36 72 1:2 — 6 Pass FailNA Fail Oil + 6% Aliphatic Solvent Comp Ex 5 OSP 680 + Castor 7.7 70 1:9— 6 Fail Pass Fail Pass Oil + Aliphatic Solvent Inventive OSP 680 +Castor 15 75 1:5 — 4 Pass Pass Pass Pass Ex 1 Oil + Aliphatic SolventInventive OSP 680 + Castor 15 75 1:5 — 6 Pass Pass Pass Pass Ex 2 Oil +Aliphatic Solvent Inventive OSP 680 + Castor 18 72 1:4 2 6 Pass PassPass Pass Ex 3 Oil + Aliphatic Solvent + Tackifier Inventive OSP 680 +Castor 15 75 1:5 1.33 6 Pass Pass Pass Pass Ex 4 Oil + AliphaticSolvent + Tackifier

The specific components of the lubricant oil composition used in furtherinventive examples are listed in Table 3

TABLE 3 Ratio of Disperse- Polymer ability (tested (OSP): using a ZeroDrip Veg Base pressurised (No Sag Polymer Vegetable stock Stabilityaerosol on Spray Examples Composition (OSP) Base Oil (w/w) Solvent ofBlend canister) Application) Comp Ex 6 OSP 680 + Castor Oil + 15 75 1:56 Fail Fail Fail Iso Propyl Alcohol (Alcohol) Comp Ex 7 OSP 680 + CastorOil + 15 75 1:5 6 Pass Fail Fail Diesel (C12-C16 Mineral solvent)Inventive Ex 5 OSP 680 + Castor Oil + 15 75 1:5 6 Pass Pass Pass Hexane(aliphatic Solvent) Inventive Ex 6 OSP 680 + Castor Oil + 15 75 1:5 6Pass Pass Pass Methylene Chloride (Chlorinated Solvent) Inventive Ex 7OSP 680 + Castor Oil + 15 75 1:5 6 Pass Pass Pass 6% Acetone (Ketone)Inventive Ex 8 OSP 680 + Castor Oil + 15 75 1:5 6 Pass Pass Fail 6%Toluene (Aromatic)

It is evident from the data contained in Table 2 and 3, that thelubricant oil composition according to the present application(Inventive examples 1-8) exhibits high load carrying capability, zerodrip property, blend stability, maximum disperseability andpenetrability in the chain linkages. The comparative examples in 1-7using alcohols, synthetic derived polymer, castor oil, and aliphaticsolvent below and beyond the claimed weight ratios do not pass theperformance test for all the critical performance attributes requiredfor complex chain linkages.

We claim:
 1. A lubricating oil composition comprising: a) an oil solublepolyalkylene glycol polymer; b) a vegetable base stock; and c) anorganic solvent excluding alcohol, wherein the oil soluble polyalkyleneglycol and the vegetable base stock are present in a weight ratio from1:2.6 to 1:8.
 2. The lubricating oil composition as claimed in claim 1,further comprising tackifiers and additives.
 3. The lubricating oilcomposition as claimed in claim 1, wherein the oil soluble polyalkyleneglycol polymer is present in the range of 10% to 18% by weight of thecomposition.
 4. The lubricating oil composition as claimed in claim 1,wherein the vegetable base stock is present in the range of 71% to 79%by weight of the composition.
 5. The lubricating oil composition asclaimed in claim 1, wherein the organic solvent is a fast evaporatingsolvent with evaporation rate in the range of 6 to
 9. 6. The lubricatingoil composition as claimed in claim 1, wherein the organic solvent ispresent in the range of 4% to 7% by weight of the composition.
 7. Thelubricating oil composition as claimed in claim 1, wherein the vegetablebase stock comprises at least one of castor oil, olive oil, peanut oil,rapeseed oil, corn oil, sesame oil, cotton seed oil, soybean oil,sunflower oil, hemp oil, linseed oil, tung oil, jojoba oil, lard oil andderivatives thereof.
 8. The lubricating oil composition as claimed inclaim 1, wherein the organic solvent comprises at least one ofoxygenated solvents, halogenated solvents and hydrocarbon solvents. 9.The lubricating oil composition as claimed in claim 7, wherein thevegetable base stock is a hydrogenated castor oil.
 10. The lubricatingoil composition as claimed in claim 1, further comprising an anti-wearagent and extreme pressure agent, a corrosion inhibitor, and a metaldeactivator.
 11. The lubricating oil composition as claimed in claim 1,wherein the vegetable base stock has a kinematic viscosity in the rangeof 200 cSt to 300 cSt at a temperature of 40° C.
 12. The lubricating oilcomposition as claimed in claim 1, wherein the oil soluble polyalkyleneglycol polymer has a kinematic viscosity in the range of 612 cSt to 748cSt at a temperature of 40° C.
 13. The lubricating oil composition asclaimed in claim 1, wherein the composition is free of anti-slag, flowmodifier additives, or combinations thereof.
 14. The lubricating oilcomposition as claimed in claim 1 has a viscosity index as per ASTM D2270 of from 150 to 180.